RFC: A108 LOAD/SAVE support changes

This is a very quick request for comments on some changes that will be made to get the new LOAD/SAVE code working the way we want in A108. I think most of these are obvious, but if you have some insights, post them.

CHECKSUM/part will be added

DECOMPRESS/part will be added

If possible, also:

Better validation of compress header before memory allocation is attempted.